Sliding window controlled by spiral spring



NOV. 25:

A. HIEBER SLIDING WINDOW CONTROLLED BY SPIRAL SPRING Filed Aux. 1521 Patented Nov. 25, W24.

AUGUST HIEBER, OF CANNSTATT-STUTTGART, GERMANY.

SLIDING WINDOW CONTROLLED B YSPIRAL SPRING.

Application filed August 3, 1921. Serial No. 489,636.

To all whom it may concern Be it known that I, AUeUsr Hinnnn, a citizen of the Republic of Germany, residing at Cannstatt-Stuttgart, Vurtemberg, Germany, have invented. certain newand useful Improvements in Sliding i/Vindows Controlled by Spiral Springs, of which the following is a specification.

' This invention relates to an improvement in the construction of a sliding window which is held at any position by a spring controlled bell crank lever.

The improvement consists in the special manner of regulating the tension of the 7 spring so that it corresponds always with the actual weight of the window and further in the special construction of the lever which is arranged so that in certain end positions this lever acts as a rigid but spring con trolled element and that in other end positions of said lever the action of the spring is neutralized by the position of the parts of the lever, with regard to each other and with regard to the direction of movement of the window. In this latter case the spring can no longer lift or lower the window which is thus secured in its position.

The adjustability of the tension of the spring is obtained by giving to the spring casing a square cross section and by reinovably mounting said casing in-a holder fixed to the wall,"said casing having an abutment adjustable upon the spring axle,

the bell crank lever being pressed against said abutment by the action of the spring. In order to alter the tension of the spring it is merely necessary to adjust the abutment and to push the casing, after it has been turned, e. g., for 90, into the holder which for this purpose is preferably open at the side.

In order to neutralize the action of the spring in certain positions the two parts of the lever are connected. the one with. the other and. with. the window in. such a man ner that both parts point either in the direction of the movement of the window or that the joint of the lever is depressed perpendicularly to the direction of movement of the window. On one of the parts of the lever an abutment is arranged so that it comes in contact with the other part of the lever when the two parts of thelever are in a determined position, so. that the two pa ts o -t e lev a t like a rigid lever n one direction, being however still spring controlled.

In order that the invention may be clearlv understood, I shall proceed to describe the same with reference to the forms of construction shown by way of example in the accompanying drawing, wherein I Fig. 1 shows in front elevation a window in closed position.

Figs. 2 and 3 are side elevations of Fig. l showing. the window respectively closed and open.

Fig. 4 shows the window in side elevation, the lower sash being brought to the horizontal position to be cleaned.

Fig. 5 is a horizontal section on a larger scale showing the spring housing mounted in the frame. 7

Figs. 6 and 7 are front views respectively ofa small end of a large carriage window with one and with two adjusting devices.

Fig. 8 is a vertical section of Figures 6 or 1 Fig. 9 shows on a larger scale a; section through the spring housing taken perpendicularly to the pivot axle.

Figs. 10 and 11 are respectively a plan view and an axial section through the adjusting device.

The lower sash a of the window has laterally projecting stubs 7) adapted to slide in guide grooves c which are essentially vertical but bent at the lower end as shown by Figures 2-4 towards the fixed sash d.

For fixing the sliding sash a at any position the spiral spring 6 is provided which is fixed with one endin its housing 9 and with its other end on a revoluble axle h (Fig. 9). This axle 7b is mounted with one end in therear wall of the housing for the spiral spring. Upon the spring axle 7a, the locking lever of the window sash a, is fixed which consists of two parts l2 and Z pivotably connected the one with the other. The part which acts as a lever arm is mounted upon the axle h, the part Z pivotably con nected with part A. by a pivot bolt m being connected with the window sash a by a lat-- erally projecting stud n of said sash projecting through a slot 0 of the part Z. The slot 0 serves to permit the lifting of the window sash for such a distance that (e. g, with windows for railway cars Figures 6 and 7 or with sliding windows as shown by Fig 2) e W ndow sash an be li t ver the weather ledge without the aid of the spring.

The housing f/ of spring'e is of square cross section (big. 9) and it is located-lira holder 9 fixed inthe frame 2 of-the window, said holder being open at the side so that housing after having'i been turned for 90 can be inserted in said holder. For regulating the tension of'the' springe a'stopr, e. a screw, is arranged upon .the cover plated ofthehousi'ng. Four holes am the cover plate 71 are designed to ,IBCGlVB' said stop; The head of the screw 17 serves as abutment for'the lever is fixed upon the spring a gle hand pressed against this abutment through the action of the spring. When the tension of spring c "has to he ncreased; if for examplethe' window sash a; is: of greater weight than" usual, the-lever jas"been" ,turned andth'e housingafter having beentiirned for 90' 'isinser'teddn :the lder 9.-

The lever has further a'counter hearing 75 (see Figures 9 and 10) which grips behind thejpartl'when the two parts 70, Z hive adopted] a determined position (see 3' an'd'4) so that'the jumping. over of the dead ppint position prevented. The two p rtsjkf and; Z then form'a' 'rigid system which is however still controlled by the springfe. p

Thetwo parts in, Z of'th'e' lever are constructed and connected with the window sa' s "'Zi in such a manner that, the. action'of tlie 'spring is neutralized when the window sash is in the closed or ,in'the open position;

As'shown' Fig. Z the partsk and Z can beb'ro'ught' into such a position that they are b th situated approximat ly 'injthe; directionfof the movement of the'w'mdow sash andthat th ctio n' of the springisneutral ized, an; abutment u. of part Z' prevents. the excessive turning ofthi'e l$ver. Figs. 6' and '7 show in dim "and daslirlines how the action ofthe spring is'neut'ralijzedbythe part Z being pressed by thefpartla or by thespring perpendicularly to thedirection ofmo ve ment or the window sash a so that'the spring does enter into action only when the-fwindow sash a has been slightlylift'ed by hand so that the" tw parts of' the lever are brought to the angular position the part Zstanding at auangle to partflrt.

Claims;

1, sliding window controlledby a spiral spring comprising in combination; with the window sash slidable in the window. frame and with aspiral spring, avhousing for-said spring of square cross section, an: axle for saidspring: fixed in sai dihousing, a holder for said housingembeddedin said window frame, a; one ar'ined' -lever fixedupon said axle, of; the spring. an upper arm pivotably connected :With the upperfend 1 of said lever mutating a slot at its upper end, a stud projecting from the window sash engaging withsa-id slot'of the upper partof the lever anda stop for'theleveradaptedto be'lixed in-saidspring housing at different positions with regard to the said spring axle.

2. A sliding window controlled by a spiral sprii'l'g comprising in combination with the window sash slidablo in the window frame and with 'a'spiral spring, a housing for said siring of square cross section, an axle for said spring fixed in said housing,'a holder for said housing "open at the side embedded in said window frame, a one-armed lever fixed upon said axle'ofthe spring, an'uppe'r arm ipivotab'ly connected with the upper end ofsaidlever and having a slot at its upper end, a stud projecting from the window sash engaging with said slot'of the upper part of the lever and a stop for the lever adapted to he fixed in said spring housing at dilierentposition's with regard to the said spring axle.

3. A sliding window controlled by a sprial spring comprising in combination with the window sash slidable in the wii'idow frame and with a spiralspring, a housing for said spring of square cross section, an axle for said sp'ringfiivedi'n saidhousing, a holder for said housing embedded in said window frame, a one-armed lever fixed'u'pon said'axle'of'the spring, an upper arm pivotably connected'with'the upper end of said lever and having a slot at its upper end, a stud'projecting from the window sash engagingwith saidslot of the upper part of the lever, an abutment upon said upper part of'the' lever servingto lock said part and said'lever so that they forinone rigid part when they are at a determined'position and a stop for'the lever adapted to be fii'ed'in said' spring housing at different positions with regardto the said spring axle.

4-1 A" sliding window sash, a spira'l'spring, a member adapted for rotation by said spring, a lever fixed" upon said member, an arm pivotally connected to the lever remote from the spring, saidarm having a slot in its free end to provide for connection with the sliding window, and a stop arrangedadjaeent" the spring to lil'nit' the movement of the lever under the influence oi the spring, said, stop being adapted for a variety of positions to variously limit the movement ol the lever.

5. A sliding. window sash, a spiral spring, means whereby said spring; may be tensioned a. lever adapted to be operated by said. spring, said spring. tensioning means includingan element to serve as a limitstop for the movement of the lever in one direction, an arm pivotally conneeted to the free end of the lever andalso movably connected to the window sasln. and'means whereby said arm and lever" when in a predetermined position are held in relatively rigid relation While still subjected to the action of the means for adjusting the tension of the spring 10 spring. While permitting the limit movement of the 6. A sliding Window sash, a spiral spring, lever under the influence of the spring. a member adapted for rotation by said In testimony whereof I affix my signature spring, a lever fixed upon said member, an in presence of two Witnesses.

arm plvotally connectedto thelever remote AUGUST HIEBER. from the spring and adapted for relatively Witnesses rigid relation to the member in a predeter- HOWARD TAYLOR,

mined position of the arm and lever, and AUGUST SIETERIEL. 

